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fiasKO [112]
2 years ago
11

Some water released 7800 J of energy when cooled from 78°C to 33°C. What was the mass of the water?

Chemistry
1 answer:
Karo-lina-s [1.5K]2 years ago
4 0

Answer:

-41. 47

Explanation:

m = q / Cp x T

m = Mass

q = Energy (or joules)

Cp = Heat Capacity

T = Change in Temperature

Water's heat capacity is always 4.18.

This is the formula you'll need for change in temperature:

Final - Initial

So, 33 - 78 = -45

m = 7800 / 4.18 x -45

= -41.47

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Which equation is set up correctly to determine the volume of a 1.5 mole sample of oxygen gas at 22°C and 100 kPa?
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The volume could be calculated by using  <span>V = n RT / P </span>

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T = Temperature (ideally this would be in Kelvin, but i don't see it in the option)
P = Pressure


I believe the answer is

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3 years ago
What name is given to the minimum amount of energy needed by particles for them to react when they collide?
makkiz [27]

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Explanation:

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Journal making expressing qualitative data and quantitative data.
barxatty [35]
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3 years ago
A sample of an ideal gas has a volume of 2.21 L at 282 K and 1.03 atm. Calculate the pressure when the volume is 1.84 L
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3 0
3 years ago
A 12.0% sucrose solution by mass has a density of 1.05 gem, what mass of sucrose is present in a 32.0-mL sample of this solution
natulia [17]

Answer:

Option C. 4.03 g

Explanation:

Firstly we analyse data.

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Density is the data that indicates grams of solution in volume of solution.

We need to determine, the volume of solution for the concentration

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Volume =  100 g / 1.05 g/mL → 95.24 mL

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7 0
3 years ago
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